Flat-opening leaf for books.



No. 855,049. PATENTED MAY 28, 1907.

J. J. DIBHL. FLAT OPENING LEAP FOR BOOKS.

APPLICATION IILED JUNE 11, 1,906.

" UNITED I STATES A'rEN r oF roE.

JOHN J. DIEHL,- OF CHICAGO, ILLINOIS, AssmNoR or ONE-THIRD T HOYT N. MoCLAIN AND ONE-THIRD To WALTER HOLLQWELL, OF CHICAGO,

ILLINO s FITAT-OPENING LEAF Fo ooKs;

Specification of Letters Patenti Patented May 28 907.

Application filed June 11.1906, Serial in. 321.138.

1'0 u/ZZ whom it may concern:

Be 1t known that 1, JOHN J. DIEHL, a citi-' I zen of the United States; residing at Chicago,

'. leaf of simple and, in its general features,

usual constructionand which has formed as an integral part thereof a hinge strip or band rendered more flexible than the remainder or main body of the leaf; thishinge-stripbeinglocated along'galine coincident with that part of the leaf'which ordinarily is bent most abruptly in opening a book."

Referring to" the drawing, 1 designates as a wholea leaf, which is formed of any suitable dense and moderately-heavy or heavy paper which in itself possesses considerable stiffness.

Sized ,paper is most commonly employed, and the present invention can .be very 'efii-' ciently and satisfactorily. embodied in a leaf having considerable ledger paper.

Across the sheet, at a'suitable distance from, and parallel with, the edge'which'is to' be bound'm' to form the boo k', I prov dea' band-like strip 2 which is treated in a pe-= culiar manner tore'nderit very considerably more flexible than the. remainder of the sheet.' This increased flexibility ,is secured v on, a glossy burnishe sizing, such as ordinary and in the peculiar manner in which this-is accomplished resides the present invention. I have discoveredthat if a sheet of paper surface as to materially interfere with its 5 availability for writing thereon with ink,

of thegeneral character described be sub- 6o jected to the rubbing action of a comparat vely coarse stone or analogous rough surface under a moderate pressure'and accompanled by a continuous traverse or progressive movement of the paper relatively to the stone, andin a direction parallel with the .progressive movement of that part of the stone whichengages the aperya series of exceedingly minuteparal el scores will be formed .Without removing any consider- 7o able portion of the surface of the paper. If the surface thus treated is made in the form of a band extending across the sheet, as shown at A in the drawin and withlthe score lines extending paral e1 with the direotion of the band, the flexibility of 'the sheet along "this. line is vgreatly increased. This increased flexibility can not be said to be due to the removal of the sizing because as a matter of fact where the paper is heav- 8o ily sized the hinge strie) thus treated takes d ut striated appearance. The increasedflexibility is doubtless due to the fact that the surface sizing and the surface fibers.are,*.by the action of the 8 stone; formed into minuteridges alternated with minute creases, and the increased flexibility thus brought about. That is to say,

thesurfa'cefibers are combed out, as it were, and laid parallel with the minute score lines while the presence of the sizir ig prevents such surface fibers from bein removed or bodily torn away, and it is pro able that the heat due to the rubbing friction 7 m0- 'mentarily softens the'sizi'ngy an'd inthis 5, v

manner facilitates the re-arrangement of' the fibers in parallelism with 'eachj,other;iand facilitates the formation of: the miiiute score lines or creases withoutsubst'a'nti ally tearing away the surface ofthe pa er.

F rom the foregoing it Wlll be obvious that the leaves may be treated-by ,th'e fse'of any suitable mechanism; but lpreferjtp employ" "a simple apparatus, the striae-formmg' memwithout removing an considerable "part of" the leaf'structu're wit out perforating uncturing or otherwise substantially mut ating the paper, and without so destroying the be'r of'which is an ordina' .grind-stone orl'i' 'g emery wheel of moderatey coarse, grain, I having a narrow cylindric grinding face. f

Referring to Figs-J3 and ;4,;1 designates a suitable standard frame carrying a table 2 upon which is mounted an upstanding sup-' a slightly elevated from the face of the table;

the extentof upward movement is limited bya stop 11. In the lower part of the frame is mounted a foot lever or trea'dle ll pivoted at- 13, and with its intermediate portion is connected a strap 14 which extends uptab e wardlythrough an opening 15 in theand connects with the yoked-together bearings 4 and 5. By depressing the foot lever the-wheel line is brought into bearing with v the face of the table or with the sheet to be treated interposed between the table and That part of the face of face of the wheel. the "table which underlies the acting face of the wheel is of wood or other material affording an appreciable amount of frictional resistance to the movement of the leaf over the same.

The operation of treating the leaves consists simply in introducing the edge of. the

leaf beneath the stone, depressing the latter by means of a foot lever and lightly guiding and restraining the leaf as it-is drawn quite irapidly'throiigh beneath the wheel by the l rotation of. the latter. The leaf is placed i far enough beneath the stone to cause I the latter to commence the formation of the 'band at a short distance from the advance edge of the leaf, and as the rear edge of the leaf approaches the acting surface of the stone the latter is allowed torise so that the I treated stri terminates short of the edge, as shown clear y in Fig; 1. The wheel is driven at a-comparativelyhigh rate of'speed, and the leaves are fed through at a moderate speed, the operation occupying say from one andone-half to two seconds in treating aileaf-of ordinary size, say twelve inches in width.

I claim as my invention:

' A leaf of sized paper provided with an integralband-like flexibleliinge strip, said .strip being surfaced with minute corrugations extending lengthwise thereof and consisting mainly of sizing, and the body of the strip being unbroken and uncorrugated.

. JOHN J. DlEllli.

- Witnesses:

EMILIE RosE, Y

FRANK L. BE-LKNAP. 

